Rain Bird® A12521 PVB10RNDP PVB Professional Series 10" Purple Round Valve Box Body and Overlapping Lid. Over the years, you’ve come to trust the Rain Bird® name because we hold our products to a higher standard — and our valve boxes are no exception. The new Rain Bird® PVB Professional series offers rugged, no-nonsense dependability, but with a price tag that can meet any budget. Coupled with the Rain Bird® VB Specification series, you have a full range of reliable valve boxes that deliver strength and value to any project.